Integrated intelligent pretreatment device

Abstract

An integrated intelligent pretreatment device relates to the technical field of ion chromatograph auxiliary devices and comprises a shell, an extraction column is fixedly mounted in the shell, an activated solvent inlet pipe, a leacheate inlet pipe, an eluent inlet pipe and a connecting pipe are mounted on the periphery of the upper end of the extraction column respectively, and a particulate matter filter cartridge is mounted at the upper end of the connecting pipe. A sample liquid inlet is formed in the upper end of the particulate matter filter cartridge, the particulate matter filter cartridge is fixed to the shell, a tee joint is installed at the bottom of the extraction column, a waste liquid discharge pipe and an extraction liquid discharge pipe are arranged at the outlet end of the tee joint, and a heavy metal adsorption barrel is arranged below the extraction liquid discharge pipe; the heavy metal adsorption cylinder and the shell are fixed through a connecting frame. According to the scheme, the problem that in the extraction column passing process of an existing ion chromatograph pretreatment column, the flow loss of a to-be-detected substance is large easily occurs is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for ion chromatographs, specifically an integrated intelligent pretreatment device. Background Technology

[0002] An ion chromatograph is an instrument used to analyze ionic compounds. It can be used to detect various anions and cations in water, such as common chloride ions, sulfate ions, nitrate ions, sodium ions, calcium ions, and some heavy metal ions, to assess water pollution levels. It can also be used to analyze water-soluble ions in atmospheric particulate matter to understand the composition and sources of air pollution.

[0003] For example, the Chinese authorized patent CN206114602U, entitled "An Ion Chromatograph," includes an ion chromatograph body. An injection port is provided on the side panel of the ion chromatograph body, and a baffle is provided below the injection port. The baffle is rotatably connected to the ion chromatograph body. A limit block is provided below the baffle, and a groove is provided on the upper surface of the baffle. A spirit level is provided above the injection port, and a storage cavity is provided below the injection port. A door is provided on the storage cavity, and the door is connected to the storage cavity via a telescopic rod. Universal wheels are provided below the ion chromatograph body, and support feet are provided adjacent to the universal wheels. The support feet are connected to the ion chromatograph body via a telescopic mechanism. A power cavity is provided on the front panel of the ion chromatograph body, and a control button is provided above the power cavity. A stool is provided on the upper surface of the ion chromatograph body, and the stool includes a seat and legs. The seat is connected to the ion chromatograph body via a snap-fit ​​connection.

[0004] Existing technologies use ion chromatography to determine samples. When the sample matrix is ​​complex, multiple pretreatment columns are required, which is time-consuming and results in significant loss of the analyte during the continuous column pass. Therefore, this technology does not meet current needs. To address this, we propose an integrated intelligent pretreatment device. Utility Model Content

[0005] The purpose of this invention is to provide an integrated intelligent pretreatment device to solve the problem mentioned in the background art that existing ion chromatography pretreatment columns are prone to significant loss of analyte during the extraction and column pass.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated intelligent pretreatment device, comprising a housing, an extraction column fixedly installed inside the housing, an activation solvent inlet pipe, an eluent inlet pipe, an elution liquid inlet pipe and a connecting pipe respectively installed around the upper end of the extraction column, a particulate filter cartridge installed at the upper end of the connecting pipe, a sample liquid inlet provided at the upper end of the particulate filter cartridge, and the particulate filter cartridge fixed to the housing, a T-junction installed at the bottom of the extraction column, a waste liquid outlet pipe and an extraction liquid outlet pipe respectively provided at the outlet end of the T-junction, a heavy metal adsorption cylinder provided below the extraction liquid outlet pipe, and the heavy metal adsorption cylinder fixed to the housing by a connecting frame.

[0007] Preferably, a pressure pump is installed above the extraction column, and a first electrically controlled valve is installed on the outside of the solvent inlet pipe, the eluent inlet pipe, the elution inlet pipe, and the connecting pipe.

[0008] Preferably, the particulate filter cartridge is provided with an installation frame inside, and the installation frame is engaged with the particulate filter cartridge. The installation frame is provided with three sets of filter screens with mesh sizes increasing sequentially from top to bottom.

[0009] Preferably, the upper and lower ends of the heavy metal adsorption cylinder are provided with mounting brackets, and the space between the two mounting brackets is filled with chelating resin.

[0010] Preferably, a second electrically controlled valve is installed on the outside of both the waste liquid drain pipe and the extract liquid drain pipe.

[0011] Preferably, the lower end of the interior of the outer shell is provided with a waste liquid tank placement cavity, and the lower front end of the outer shell is provided with a slot communicating with the waste liquid tank placement cavity.

[0012] Preferably, the bottom of the heavy metal adsorption cylinder is provided with a liquid outlet pipe, and a sample liquid outlet pipe is installed at the lower end of the liquid outlet pipe. The sample liquid outlet pipe is connected to the sample interface of the ion chromatograph, and a pump is installed at the end of the sample liquid outlet pipe located inside the outer shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This invention features a solid-phase separation mechanism that utilizes the physicochemical interaction between the adsorbent and organic matter to precisely adsorb target organic compounds from a complex matrix. Compared to traditional methods, this significantly improves the separation efficiency of organic matter, providing a purer target sample for subsequent analysis, reducing interference from impurities, and enhancing the accuracy and reliability of the analysis. The crucial step of injecting eluent effectively washes away unadsorbed impurities and interfering substances. This not only results in higher purity of the target compound in the final collected eluent but also reduces the risk of impurities accumulating inside the equipment. With the aid of a three-way valve, waste liquid and eluent can be automatically discharged from their respective pipes and enter the next processing step. This automated design greatly reduces manual intervention, minimizing errors and the risk of cross-contamination caused by manual operation.

[0015] 2. This invention utilizes a pressure pump installed above the extraction column. This pump applies additional pressure to the sample solution, causing it to pass through the extraction column more quickly. In traditional gravity-fed extraction, the sample passes through the extraction column slowly, especially for high-viscosity samples or those with long column beds. The pressure pump significantly increases the sample solution flow rate and provides stable control, ensuring a constant flow rate throughout the loading process. This is crucial for solid-phase extraction, as fluctuations in flow rate can lead to unstable contact time between the target organic matter and the adsorbent, affecting the consistency of adsorption performance. A stable flow rate ensures that each batch of samples is processed under identical conditions, guaranteeing uniformity in processing results across different samples.

[0016] 3. This invention incorporates a particulate filter cartridge at the front end of the extraction column. The filter cartridge contains an internal filter screen that intercepts various particulate matter from the sample. If these particles were to directly enter the extraction column, they could accumulate inside, clogging the gaps between the adsorbent particles and hindering the normal passage of the sample solution, significantly shortening the column's lifespan. The filter cartridge effectively reduces the risk of column clogging and decreases the frequency of replacement due to column damage.

[0017] 4. This invention features a heavy metal adsorption cylinder installed at the lower end of the extract column's extractant outlet. The cylinder contains chelating resin, which exhibits a unique chelating effect on heavy metal ions, enabling targeted and efficient adsorption of heavy metals from the extractant. Compared to other conventional adsorption methods, the chelating resin forms stable chelates with heavy metal ions, significantly improving the adsorption capacity and selectivity for heavy metals. Attached Figure Description

[0018] Figure 1 This is a perspective view of the entire utility model;

[0019] Figure 2 This is a perspective view of the internal processing mechanism of the outer shell of this utility model.

[0020] Figure 3 This is a top view of the present invention;

[0021] Figure 4 For the present utility model Figure 3 Schematic diagram of section AA.

[0022] In the diagram: 1. Outer shell; 2. Particulate filter cartridge; 3. Pressure pump; 4. Activated solvent inlet tube; 5. Eluent inlet tube; 6. Elution solution inlet tube; 7. Sample solution outlet tube; 8. Waste liquid tank; 9. Connecting tube; 10. First electrically controlled valve; 11. Extraction column; 12. T-junction; 13. Waste liquid outlet tube; 14. Extraction solution outlet tube; 15. Second electrically controlled valve; 16. Heavy metal adsorption cartridge; 17. Discharge tube; 18. Pump; 19. Mounting frame; 20. Filter screen; 21. Chelating resin; 22. Support frame. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figure 1-4 An embodiment of this utility model provides an integrated intelligent pretreatment device, including a housing 1. An extraction column 11 is fixedly installed inside the housing 1. An activation solvent inlet pipe 4, an eluent inlet pipe 5, an elution liquid inlet pipe 6, and a connecting pipe 9 are respectively installed around the upper end of the extraction column 11. A particulate filter cartridge 2 is installed at the upper end of the connecting pipe 9. The particulate filter cartridge 2 is provided with a sample liquid inlet at the upper end and is fixed to the housing 1. A three-way valve 12 is installed at the bottom of the extraction column 11. A waste liquid discharge pipe 13 and an extraction liquid discharge pipe 14 are respectively provided at the outlet end of the three-way valve 12. A heavy metal adsorption cylinder 16 is provided below the extraction liquid discharge pipe 14 and is fixed to the housing 1 by a connecting frame.

[0025] An activator is injected into the extraction column 11 through the activating solvent inlet tube 4. Subsequently, the sample liquid enters the column through the connecting tube 9 and comes into contact with the solid adsorbent. The organic matter in the sample is adsorbed onto the surface of the adsorbent due to physical or chemical interactions with it. Then, the adsorbent is rinsed by eluent inlet tube 5 to remove unadsorbed impurities and interfering substances. Finally, the eluent is injected into the extraction column 11 through the eluent inlet tube 6 to elute the target compound from the adsorbent and collect the eluent. The strength of the eluent must be sufficient to disrupt the interaction between the target compound and the adsorbent, thereby achieving the desorption of the target compound. Under the action of the three-way valve 12, the rinsing liquid is discharged from the waste liquid outlet tube 13, while the eluent enters the next processing step from the extraction liquid outlet tube 14.

[0026] Please see Figure 1 , Figure 2 and Figure 4 A pressure pump 3 is installed above the extraction column 11. First electrically controlled valves 10 are installed on the outside of the activation solvent inlet pipe 4, eluent inlet pipe 5, elution inlet pipe 6, and connecting pipe 9. For samples with particularly complex matrices containing a large amount of particulate matter or viscous substances, relying solely on gravity flow may cause blockage of the extraction column, preventing the sample from passing smoothly. The additional power provided by the pressure pump 3 overcomes these obstacles, ensuring a continuous and stable flow of the sample solution through the extraction column 11, even with complex samples, thus ensuring the smooth progress of the solid-phase extraction process. The opening and closing of the first electrically controlled valves 10 precisely controls the timing and flow rate of the activation solvent, eluent, elution solution, and sample solution entering the extraction column 11, achieving automated control, reducing errors from manual operation, and improving the accuracy and repeatability of experimental operations.

[0027] Please see Figure 4 The particulate filter cartridge 2 has an internal mounting bracket 19 that engages with it. Inside the mounting bracket 19 are three sets of filter screens 20 with progressively increasing mesh sizes from top to bottom. As the sample liquid flows downwards through the filter screens 20, larger particles are initially intercepted by the upper, smaller mesh screens. As the liquid descends, smaller particles are gradually filtered by the larger mesh screens. This improves the comprehensiveness and precision of particulate filtration, further ensuring the purity of the sample liquid entering the extraction column.

[0028] Please see Figure 4 The heavy metal adsorption cylinder 16 has mounting brackets 19 at both the upper and lower ends, with chelating resin 21 filling the space between the two mounting brackets 19. The liquid treated by the extraction column 11 is split at the three-way valve 12 according to its properties. The waste liquid generated during rinsing is discharged through the waste liquid drain pipe 13, while the extract containing the target compound flows to subsequent processing stages through the extract drain pipe 14. This achieves automatic separation of waste liquid and extract, simplifying the processing procedure.

[0029] Please see 1 and Figure 2 Both the waste liquid drain pipe 13 and the extract drain pipe 14 are equipped with a second solenoid valve 15. The lower end of the housing 1 is provided with a waste liquid tank placement cavity 8, and the lower front end of the housing 1 is provided with a slot communicating with the waste liquid tank placement cavity 8. The second solenoid valve 15 ensures that the waste liquid and extract are discharged separately at the appropriate time. After rinsing, the second solenoid valve 15 on the waste liquid drain pipe 13 is opened to discharge the waste liquid; after elution, the second solenoid valve 15 on the extract drain pipe 14 is opened to collect the extract.

[0030] Please see Figure 2 and Figure 4 The bottom of the heavy metal adsorption cartridge 16 is equipped with an outlet pipe 17, and a sample liquid outlet pipe 7 is installed at the lower end of the outlet pipe 17. The sample liquid outlet pipe 7 is connected to the sample interface of the ion chromatograph, and a pump 18 is installed at the end of the sample liquid outlet pipe 7 inside the outer casing 1. When the pump 18 is working, it generates suction to draw the sample liquid treated by the heavy metal adsorption cartridge 16 out of the outlet pipe 17 and deliver it to the sample interface of the ion chromatograph through the sample liquid outlet pipe 7. This ensures that the sample liquid can smoothly enter the ion chromatograph for detection and analysis, providing a guarantee for the accurate determination of sample components.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An integrated intelligent pretreatment device, comprising a housing (1), characterized in that: An extraction column (11) is fixedly installed inside the outer shell (1). An activation solvent inlet pipe (4), a rinsing liquid inlet pipe (5), an elution liquid inlet pipe (6) and a connecting pipe (9) are respectively installed around the upper end of the extraction column (11). A particulate filter cartridge (2) is installed at the upper end of the connecting pipe (9). A sample liquid inlet is provided at the upper end of the particulate filter cartridge (2), and the particulate filter cartridge (2) is fixed to the outer shell (1). A three-way valve (12) is installed at the bottom of the extraction column (11). A waste liquid drain pipe (13) and an extraction liquid drain pipe (14) are respectively provided at the outlet end of the three-way valve (12). A heavy metal adsorption cylinder (16) is provided below the extraction liquid drain pipe (14), and the heavy metal adsorption cylinder (16) is fixed to the outer shell (1) by a connecting frame.

2. The integrated intelligent pretreatment device according to claim 1, characterized in that: A pressure pump (3) is installed above the extraction column (11), and a first electrically controlled valve (10) is installed on the outside of the activation solvent inlet pipe (4), the eluent inlet pipe (5), the elution inlet pipe (6), and the connecting pipe (9).

3. The integrated intelligent pretreatment device according to claim 1, characterized in that: The particulate filter cartridge (2) is provided with an installation frame (19) inside, and the installation frame (19) is engaged with the particulate filter cartridge (2). The installation frame (19) is provided with three sets of filter screens (20) with mesh counts increasing sequentially from top to bottom.

4. The integrated intelligent pretreatment device according to claim 1, characterized in that: The heavy metal adsorption cylinder (16) is equipped with mounting brackets (19) at both the upper and lower ends, and chelating resin (21) is filled between the two mounting brackets (19).

5. The integrated intelligent pretreatment device according to claim 1, characterized in that: A second electrically controlled valve (15) is installed on the outside of both the waste liquid drain pipe (13) and the extract liquid drain pipe (14).

6. The integrated intelligent pretreatment device according to claim 1, characterized in that: The lower end of the shell (1) is provided with a waste liquid tank placement cavity (8), and a slot communicating with the waste liquid tank placement cavity (8) is opened at the lower front end of the shell (1).

7. The integrated intelligent pretreatment device according to claim 1, characterized in that: The bottom of the heavy metal adsorption tube (16) is provided with a liquid outlet tube (17), and a sample liquid outlet tube (7) is installed at the lower end of the liquid outlet tube (17). The sample liquid outlet tube (7) is connected to the sample interface of the ion chromatograph, and a pump (18) is installed at one end of the sample liquid outlet tube (7) inside the outer shell (1).

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